Loadout bug

I purchased a nice Rare Multi-Melta and was excited. I could now do some mean things to some ugly bastards. I placed it on loadout over the Heavy Bolter (I also put a basic flamer in my swap slot). I started up the match. I had my starter heavy bolter and plasma cannon again. So I exited the match to see if I messed up and didn't save my loadout changes or something. In my inventory were the default heavy bolter and plasma cannon that I had removed to place in my new stuff. In my loadout were the defaults; my new weapons were gone.